NotOneBit.com Killbot Form
Welcome to KillBot. This script is intended to eliminate various types of web based robots from repeatedly filling out forms by requiring the visitor to enter some simple data (called a Turing or CAPTCHA test). Many times you may have a form (feedback, poll, guestbook, etc.) on your web site and a malicious user targets a script to automatically fill out your form until it either cripples your server, skews statistics, or floods your inbox. By requiring the visitor to read the text in an image (over 900,000,000 possible combinations) and enter that with the other data in your form, you can prevent automated scripts from repeatedly filling out your form.
Please test out the sample form below for yourself and see! If you find the image too difficult to read, simply click on the image to reload the page for a new one. KillBot can be set to be case-sensitive or case-insensitive, or it can be set to display only uppercase or only lowercase. Looking for an industrial strength solution? Check out KillBot Pro!
Also available are our KillBot application with Audio. For visitors that are unable to read the KillBot code, they can listen to an audio file that will play the code for them in wav format. KillBot with audio also complies with the Americans with Disabilities Act. Check out KillBot with Audio and KillBot Professional with Audio.
Purchase the NotOneBit Killbot for $25.00 FREE! Click here to download
NotOneBit Killbot
Current version: 2.0
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To see if your installation of PHP can run the image creation part of Killbot, try this test script frist:
<?
header ("Content-type: image/png");
$im = @imagecreatetruecolor (150, 20) or die ("Cannot Initialize GD image stream");
$text_color = imagecolorallocate ($im, 255, 255, 255);
imagestring ($im, 2, 5, 5, "You can run this script!", $text_color);
imagepng ($im);
imagedestroy ($im);
?>
Requirements: PHP 4.3 or newer, GD 2.x library with Freetype enabled